I’ve been looking into optimizing images for the various image search engines and I’ve found 4 major points to address:

Keywords in file images

Keywords in ALT tags

Keywords in caption text below image

Image size

It seems at least Google’s image search uses image dimension to identify duplicate images, so if you’re working with an image other sites also use, it would be helpful to modify the image size by a few pixles, so as to not get filtered out as duplicate.

Dan Zarrella

Dan Zarrella is the award-winning social media scientist and author of four books: “The Science of Marketing,” “Zarrella’s Hierarchy of Contagiousness,” “The Social Media Marketing Book” and The Facebook Marketing Book.